Sheet-metal piling.



T. LARSSEN. SHEET METAL FILING. APPLICATION FILED APR.15, 1912.

Patented Oct. 29, 1912.

2 SHBETS-SHEET l.

T. LARSSEN. SHEET METAL FILING. APPLICATION FILED APR.15, 'l 912.

Patented 0ct.29,1912.

2 SHEETS-SHEET 2 Fig.4.,

TRYGGVE LARSSEN, OF BREMEN, GERMANY, ASSIGNOR, TO

PATENT carton.

THE FIRM OF DEUTSGH LUXEMBURGISCHE BERG'WERKS- UNI)HUTTEN-AKTIENGESELLSCHAFT, 0F BOCHUM,

GERMANY.

Specification of Letters Patent.

SHEET-METAL FILING.

Patented Oct. 29, 1912.

Application filed April'lfi, 1912. Serial No. 690,823.

To all "whom it may concern Be it known that I, Tnroovn Lnnssmv, acitizen of the German Empire, residing at Bremen, Germany, have inventedcertain new and useful Improvements in or Relating to Sheet-MetalPiling, of which the following is a specification.

The specification of Letters Patent No. 839608 describes theconstruction of sheet metal piling consisting of dished piles, 2'. e.

sheets of approximately U-shaped cross section, facing alternately rightand left, and joined together at their edges.

The object of the present invention is to better utilize the depth ofthe undulation aifordedby the dished shape of the piles, and therebyconsiderably increase the moment of resistance, without adding t thebulk of material used. This is effected by providing the plates, at theS-shaped ends of their limbs, with hook or flanges extending outwardfrom the webs of the said S-shaped'tlanges and coacting with the latterto make the joint. In joining two plates, one or both of which are soconstructed at the joint, the outer faces of the flanges are caused tomeet, the engagement being made by means of the hook or hooks, whereasin the previous construction referred to the inner surface of a flangewith a single bend and the inner surface of the S-shaped flange abuttedagainst one another and consequently reduced the depth of the undulationby the double flange thick the hook can be rolled, it is advantageous toprovide the edges of both plates with symmetrical flanges and hooks. Thesymmetrical form provides a double flange connection which results in atighter jointas well as being advantageous from the point of view ofrolling and construction. The symmetrical shape ofthe edges of theplates also prevents strains from occurring during the rolling process,which is particularly important in the case of long planks. Strained anddistorted planks entail a considerable amount of after labor tostraighten them and this operation produces impressions in the surfacewhich prevent smooth passage during the ramming operation, withresultant strains in all the joints.

shaped projections 3 the two Since the profile of the S-fiange and I Theinvention is illustrated in the accompanying drawings in which Figures1, 2, 3 and t are sectional views showing four forms of construction,Figs. 1, 2, '5 and 4 being detail views showing the respective joints,

Referring in the first instance to Figs. 1 and l a is the downwardlybent flange of one plate, and b the -S-shaped edge of the other plate.The S-shaped flange has a hooked projection extending outward from itsweb 6, beyond the plane (Z, in which the flanges meet, and this hook fengages under the flange a, of the latter against the outer face of theS-flange.

In the construction shown in Figs. 2 and 2, the plate is providedsymmetrically at both edges with the S-flange and hook. The two hooks atthe joint engage with each other, and the two outer parts i of theS-flanges embrace the hooks.

In the construction shown in Figs. 3 and S-lianges 7) engage with eachother internally, and the hooked parts f embrace the S-tlanges.

In the construction shown in Figs. l and t, the S-flanges b have anadditional bend, or are provided with extensions k which engage thehooks f. This construction has the advantage of leaving both sides ofthe joint smooth.

lVhat I claim is 1. Sheet piling composed of sheets of U-shapedcross-section, facing alternately in opposite directions and provided ateach junction with an integral interlocking S-shaped flange, the web ofsaid flange having air-integral hooked projection adapted to interlockwith a flange abutting against said web. i

2. Sheet piling composed of sheets of U-shaped cross-section facingalternately in opposite directions and provided at each junction with anintegral S-shaped flange, each sheet having symmetrical S-shaped flangesand hooked projections at the junction. I

3. Sheet piling composed of sheets of U-shaped cross-section facingalternately in opposite directions and provided at each junction with anintegral S-shaped flange drawn to a larger scale.

and a hook, said flanges and hooks adapted adapted to intermesh withsaid hooked pro- 10 to interniesh and form an interlocking oint ectionforming an interlocking oint.

at the junction. In testimony whereof I aiiix my signature 4. Sheetpiling ooinposed of sheets of in presence of two Witnesses. U-shapedcrosssecuon, facing alternately TRYGGVE LARSSEN.

in opposite directions and provided at each junction with an integralS-shnped flange, Witnesses:

the Web of said flange having a hooked pro- VILLY KNOB, jection, saidflanges having bent extensions MAX Fm'rsnnn.

